Nonslip device



J. G. ZERTUCHE.

NONSLIP DEVICE.

APPLICATION FILED MAR. 11, 1921.

1,41 1,200. Patented Mar. 28, 1922.

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NONSLIP DEVICE.

Application filed March 17, 1921 Serial 1%. 452,941.

To all whom it may concern Be it known that I, Josi': GARzA ZEnr oHn,

a citizen of'Mexico, and a resident of Mexico,

D. F, Republic of Mexico, temporarily residing in New Orleans, parish of Orleans and State of Louisiana, have invented anew and ImprovedNonslip Device, of whichthe following is a description.

My invention relates to a non-slip device comprising a suction cup which when in use is secured to an article, such as an article of footwear for men or horses, the cup being sustained inverted in a manner toprfesent its open side; to the ground for collapsing under the imposed :pressure and effecting a holding action on the ground to prevent slipping.

The invention is more particularly intended as an improvement on the non-slip device formingthe subject-matter of an application for patent filed b me August 13, 1920, Serial No. 403,248.

The general object of the present invention is to provide a suction cup of the indirated type improved in various particulars with respect to strength and durability as well as to insure the quick breaking ofthe vacuum when the foot starts to lift.

Reference is to be had to the accompanying drawings forming a part of this specification, it being understood that the drawings are merely illustrative of one example of the invention. 1

Figure 1 is a side elevation showing a shoe attachment equipped with my improved suc tion cup;

Figure '2 is a fragmentary longitudinal vertical section on an enlarged scale;

Figure 3 is a diagrammatic view showing an attachment embodying two of my im proved cups.

In Figures 1 and 2 the attachment has one cup 10 adapted to be disposed beneath the ball of the foot while Figure 3 shows the device as having two cups, one beneath the ball of the foot and the other adjacent to the heel. The cup 10 is shown in Figures 1 and 2 as applied to a board or plate 11 to be held against the sole of a shoe. Said plate is provided with a toe piece 12 in the form of atransverse arch of flexible material be-' neath and through which the shoe may extend. V

Suitable means may be employedto secure the device in position, there being shown in Figure 1 strings 14 adapted to be tied at the Specification of Letters Patent. Patented Mar. 28,1922.

front asat 16, said strings bein secured at one end to a member 19 provide: at the rear end of the sole plate 11 in position to lie at each side ofthe shoe at the archthereof.

In the form shown in Figure 3 the side straps 14 are provided on the sole plate'll as in my application above mentioned, said straps being adapted to be connected by a buckle 15. The cupi formed with a flat central area 10 perforated to'receive a fastening rivet 16 or the like which passes through the top of the cup at the center and 7 if desirable through washers 16*, 16 at the inner and outer surfaces of the cup.

I produce a'vent orifice 17 in the cup 10 and produce a protuberance 18 about the orifice, said protuberance presenting a flat outer surface to insure an effective contact between the protuberance and the under surfaceof'the plate 11, 11 or the under surface of the equivalent supporting means presented by the article to which the cup is applied. The protuberance 18 and the orifice 17 are disposed between the top and bottom of the cup and by reason of the flaring exterior, said protuberance will be below the plate 11 when the cup is in normal form and will be quickly brought into contact with the plate 11 when the cup is collapsed. The lower edge 19 of the cup lies in a single plane for effective contact with the ground.

In use when a cup is placed against the ground as in walking and caused to collapse under the pressure exerted downwardly thereon the cup will be caused to collapse as will be ObVlOllS and the protuberance 18 will be brought into contact with the plate 11, thereby closing the orifice 17 and insuring a holding suction to prevent slipping. When, however, the pressure on the top of the cup is relieved, its resiliency will cause it to re sume its normal flaring appearance and the protuberance 18 will move away from contact with the plate 11, thereby venting the cup at the opening 17 and breaking the holdin action of the cup.

n order that the lifting of the foot may instantly break the vacuum through the medium of the opening 17, I locate said opening in accordance with the present invention at the rear side of the cup so that immediately upon the plate 11 being lifted with the lifting of the heel and-the rear portion of the shoe, the opening 17 will be exposed.

In order to strengthen and lend stability to the cup 10 I provide within the same a fiat ring extending about the cup and lyin close against the inner surface thereof. he upper edge of the ring 20 is turned laterally inward and rounded off, thereby strengthening the ring and at the same time avoiding a knife-edge that might cut into hfi mat rial Qf-the cup. The interior of the cup is lined with canvas 13, vulcanized to the rubber of which, in practice,"the body f he cu is ormed.-

embodiment of niy invention, I do not limit In self strictly to the Inechanical details herein illustrated ince manifestly the same an b con idere lyw ie Without d pa ure from thespirit of the invention as Zde- 7 Having thus described my invention, I laim w a.

"1 jAs an article of manufacture, a nonslip device comprising a resilient suction cup, and an article carrying said cup, and

adapted to secur it in position, said cup [Shite n con usion hat W il illustrated example constitutes a practical having a vent opening at the rear side of the cup and said article presenting a surface into contact with which the vented portion of the cup moves when collapsed, for the closing of said vent opening.

2. As an article of manufacture, a non-slip device comprising a resilient suction cup andan article carrying said cup and adapted to secure it in position. said cup having a vent opemng at the rearside of the cup near the top, and said article presenting a surface into contact with which the vented JOSE GARYZA EBTUGHE, 

